Enable depthmap visualization for "*depth*" files

[servantftransperfect]

Add "depth" image files to the list of allowed depthmap image file names

See alicevision/QtAliceVision#92

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 79.52%. Comparing base (b21ca05) to head (d5b39dc).
⚠️ Report is 23 commits behind head on develop.
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #2905      +/-   ##
===========================================
- Coverage    79.55%   79.52%   -0.03%     
===========================================
  Files           51       51              
  Lines         6974     6976       +2     
===========================================
  Hits          5548     5548              
- Misses        1426     1428       +2     

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